ute lid cutting

I am considering cutting an opening in my VZ factory hard lid for my dog.
Am I mad?
Has anyone here cut an opening in one?
thinking I could get a canvas lid made to clip on when not in use.
would need some kind of trim around it. may just a length of pinchweld.
Its just getting too hard to keep the front clean. we go to the beach most weekends.
I like the hard lid so dont want to take it off.